[PATCH 18/21] ASoC: amd: acp70: create a device node for soundwire machine driver

[Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>]

Add SoundWire machine register logic for ACP7.0 platform to create device
node for SoundWire machine driver.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
---
 sound/soc/amd/acp70/acp70.h     |  4 ++
 sound/soc/amd/acp70/pci-acp70.c | 72 +++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+)

diff --git a/sound/soc/amd/acp70/acp70.h b/sound/soc/amd/acp70/acp70.h
index 9774db1ac537..c7dec130f27f 100644
--- a/sound/soc/amd/acp70/acp70.h
+++ b/sound/soc/amd/acp70/acp70.h
@@ -239,9 +239,11 @@ struct sdw_dma_dev_data {
  * @pdm_dev: ACP PDM controller platform device
  * @dmic_codec: platform device for DMIC Codec
  * sdw_dma_dev: platform device for SoundWire DMA controller
+ * @mach_dev: platform device for machine driver to support ACP PDM/SoundWire configuration
  * @acp_lock: used to protect acp common registers
  * @info: SoundWire AMD information found in ACPI tables
  * @sdw: SoundWire context for all SoundWire manager instances
+ * @machine: ACPI machines for SoundWire interface
  * @addr: pci ioremap address
  * @reg_range: ACP reigister range
  * @acp_rev : ACP PCI revision id
@@ -260,10 +262,12 @@ struct acp70_dev_data {
 	struct platform_device *pdm_dev;
 	struct platform_device *dmic_codec_dev;
 	struct platform_device *sdw_dma_dev;
+	struct platform_device *mach_dev;
 	struct mutex acp_lock; /* protect shared registers */
 	struct sdw_amd_acpi_info info;
 	/* sdw context allocated by SoundWire driver */
 	struct sdw_amd_ctx *sdw;
+	struct snd_soc_acpi_mach *machines;
 	u32 addr;
 	u32 reg_range;
 	u32 acp_rev;
diff --git a/sound/soc/amd/acp70/pci-acp70.c b/sound/soc/amd/acp70/pci-acp70.c
index 6884e8516a2c..ae19187fe695 100644
--- a/sound/soc/amd/acp70/pci-acp70.c
+++ b/sound/soc/amd/acp70/pci-acp70.c
@@ -317,6 +317,42 @@ static int amd_sdw_exit(struct acp70_dev_data *acp_data)
 
 	return 0;
 }
+
+static struct snd_soc_acpi_mach *acp70_sdw_machine_select(struct device *dev)
+{
+	struct snd_soc_acpi_mach *mach;
+	const struct snd_soc_acpi_link_adr *link;
+	struct acp70_dev_data *acp_data = dev_get_drvdata(dev);
+	int ret, i;
+
+	if (acp_data->info.count) {
+		ret = sdw_amd_get_slave_info(acp_data->sdw);
+		if (ret) {
+			dev_dbg(dev, "failed to read slave information\n");
+			return NULL;
+		}
+		for (mach = acp_data->machines; mach; mach++) {
+			if (!mach->links)
+				break;
+			link = mach->links;
+			for (i = 0; i < acp_data->info.count && link->num_adr; link++, i++) {
+				if (!snd_soc_acpi_sdw_link_slaves_found(dev, link,
+									acp_data->sdw->peripherals))
+					break;
+			}
+			if (i == acp_data->info.count || !link->num_adr)
+				break;
+		}
+		if (mach && mach->link_mask) {
+			mach->mach_params.links = mach->links;
+			mach->mach_params.link_mask = mach->link_mask;
+			mach->mach_params.subsystem_rev = acp_data->acp_rev;
+			return mach;
+		}
+	}
+	dev_dbg(dev, "No SoundWire machine driver found\n");
+	return NULL;
+}
 #else
 static int acp_scan_sdw_devices(struct device *dev, u64 addr)
 {
@@ -332,8 +368,36 @@ static int amd_sdw_exit(struct acp70_dev_data *acp_data)
 {
 	return 0;
 }
+
+static struct snd_soc_acpi_mach *acp70_sdw_machine_select(struct device *dev)
+{
+	return NULL;
+}
 #endif
 
+static int acp70_machine_register(struct device *dev)
+{
+	struct snd_soc_acpi_mach *mach;
+	struct acp70_dev_data *adata = dev_get_drvdata(dev);
+	int size;
+
+	if (adata->is_sdw_dev && adata->is_sdw_config) {
+		size = sizeof(*adata->machines);
+		mach = acp70_sdw_machine_select(dev);
+		if (mach) {
+			adata->mach_dev = platform_device_register_data(dev, mach->drv_name,
+									PLATFORM_DEVID_NONE, mach,
+									size);
+			if (IS_ERR(adata->mach_dev)) {
+				dev_err(dev,
+					"cannot register Machine device for SoundWire Interface\n");
+				return PTR_ERR(adata->mach_dev);
+			}
+		}
+	}
+	return 0;
+}
+
 static int get_acp70_device_config(struct pci_dev *pci, struct acp70_dev_data *acp_data)
 {
 	struct acpi_device *pdm_dev;
@@ -570,6 +634,12 @@ static int snd_acp70_probe(struct pci_dev *pci,
 		dev_err(&pci->dev, "ACP platform devices creation failed\n");
 		goto de_init;
 	}
+	ret = acp70_machine_register(&pci->dev);
+	if (ret) {
+		dev_err(&pci->dev, "ACP machine register failed\n");
+		goto de_init;
+	}
+
 skip_pdev_creation:
 	device_set_wakeup_enable(&pci->dev, true);
 	pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS);
@@ -698,6 +768,8 @@ static void snd_acp70_remove(struct pci_dev *pci)
 		platform_device_unregister(adata->pdm_dev);
 		platform_device_unregister(adata->dmic_codec_dev);
 	}
+	if (adata->mach_dev)
+		platform_device_unregister(adata->mach_dev);
 	ret = acp70_deinit(adata->acp70_base, &pci->dev);
 	if (ret)
 		dev_err(&pci->dev, "ACP de-init failed\n");
-- 
2.34.1